eal: improve option API documentation

Use doxygen to describe the main structure and describe a little more
why it exists.

Signed-off-by: Gaetan Rivet <gaetan.rivet@6wind.com>

diff --git a/lib/librte_eal/common/include/rte_option.h b/lib/librte_eal/common/include/rte_option.h
index eea95e4..20be47d 100644 (file)
--- a/lib/librte_eal/common/include/rte_option.h
+++ b/lib/librte_eal/common/include/rte_option.h
@@ -29,8 +29,12 @@ extern "C" {
 
 typedef int (*rte_option_cb)(void);
 
-/*
- * Structure describing the EAL command line option being registered.
+/**
+ * Structure describing an EAL command line option dynamically registered.
+ *
+ * Common EAL options are mostly statically defined.
+ * Some libraries need additional options to be dynamically added.
+ * This structure describes such options.
  */
 struct rte_option {
        TAILQ_ENTRY(rte_option) next; /**< Next entry in the list. */